摘要
本文通过对下扬子地区下三迭统瘤状灰岩及其共生岩石的物质组成、微缝合线构造和古生物生態特征的研究,论证了该区瘤状灰岩是晚期成岩阶段压溶作用的产物,解释了产生瘤状构造的压溶作用机理,并认为其原始沉积物可能形成于潮下低能环境。
Based on the study of the Lithology, microstylolite and palaeontologic characters of nodular limestone and the associated rocks in the Lower Triassic from the Lower Yangtze region, this paper proves that nodular limestones in the studied region are the characteristic products of pressure solution during Late diagenetic stage, and interprets the mechanism of pressure solution which form nodular structure of rocks. The author considers taht the clayey limestone from which the studied nodular limestones were reformed had deposited essentially in subtidal Low-energy belt.
出处
《华东地质学院学报》
1989年第4期17-22,34+105-106,共6页
Journal of East China Geological Institute
